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Minor mag. 2.8 earthquake - 6.7 mi west of Skwentna, Matanuska-Susitna, Alaska, USA, on Sunday, December 28, 2014 13:09:40

Minor magnitude 2.8 earthquake at 116 km depth

28 Dec 23:10 UTC: First to report: USGS after 1 hour and 0 minutes.

Earthquake details

Date & time	Dec 28, 2014 22:09:40 UTC
Local time at epicenter	Sunday, December 28, 2014 13:09:40
Status	Confirmed
Magnitude	2.8
Depth	115.7 km
Epicenter latitude / longitude	61.9922°N / 151.6055°W (Matanuska-Susitna, Alaska, United States)
Antipode	61.992°S / 28.395°E
Shaking intensity	Not felt
Felt
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Hayes (61 km / 38 mi)
Nearby towns and cities	11 km (7 mi) W of Skwentna (pop: 37) \| Show on map \| Quakes nearby 76 km (47 mi) NW of Susitna (pop: 18) \| Show on map \| Quakes nearby 86 km (53 mi) WSW of Talkeetna (pop: 876) \| Show on map \| Quakes nearby 87 km (54 mi) WNW of Willow Creek (pop: 2,100) \| Show on map \| Quakes nearby 93 km (58 mi) WSW of Chase (pop: 34) \| Show on map \| Quakes nearby 93 km (58 mi) W of Susitna North (pop: 1,260) \| Show on map \| Quakes nearby 99 km (61 mi) NNW of Beluga (pop: 20) \| Show on map \| Quakes nearby 101 km (63 mi) WNW of Big Lake (pop: 3,350) \| Show on map \| Quakes nearby 102 km (63 mi) WNW of Houston (pop: 2,210) \| Show on map \| Quakes nearby 125 km (77 mi) NW of Alaska City (pop: 298,700) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake
Estimated seismic energy released	1 x 10⁹ joules (278 kilowatt hours, equivalent to 0.239 tons of TNT) \| about seismic energy

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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag.	Depth	Location	Source
2.8	116 km	86km WNW of Willow, Alaska	USGS

Most recent quakes Top 20 past 24 hrs Quakes in the US Alaska

Seismograms

Seismic station: Skwentna, AK, USA (SKN/AK network) | Distance from quake: 4 km / 3 mi | Show on map | Station Info

Seismic station Skwentna, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool

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Seismic station Skwentna, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Skwentna, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake, showing horizontal E-W and N-S ground movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Strandline Lake, Regional Station, Alaska (STLK/AV network) | Distance from quake: 56 km / 35 mi | Show on map | Station Info

Seismic station Strandline Lake, Regional Station, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Strandline Lake, Regional Station, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Strandline Lake, Regional Station, Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Fire Island, AK, USA (FIRE/AK network) | Distance from quake: 120 km / 74 mi | Show on map | Station Info

Seismic station Fire Island, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Fire Island, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Fire Island, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: Iliamna Volcano East, Cook Inlet, Alaska (IVE/AV network) | Distance from quake: 233 km / 144 mi | Show on map | Station Info

Seismic station Iliamna Volcano East, Cook Inlet, Alaska: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station Iliamna Volcano East, Cook Inlet, Alaska: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station Iliamna Volcano East, Cook Inlet, Alaska: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

Seismic station: McCarthy VSAT, AK, USA (MCAR/AK network) | Distance from quake: 457 km / 284 mi | Show on map | Station Info

Seismic station McCarthy VSAT, AK, USA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismic station McCarthy VSAT, AK, USA: horizontal (E-W) movement plot around time of quake (source: IRIS/BUD)

Seismic station McCarthy VSAT, AK, USA: horizontal (N-S) movement plot around time of quake (source: IRIS/BUD)

Seismograms around time of quake.
Top: vertical movement, bottom: horizontal (E-W and N-S) movements. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

At magnitude 2.8, this quake might have been felt very close to the epicenter and under calm conditions.

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

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